https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91496
Bug ID: 91496
Summary: !GCC$ directives error if mistyped or unknown
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: nickpapior at gmail dot com
Target Milestone: ---
In fortran codes I would like to use directives such as:
!GCC$ unroll <>
When trying to compile a fortran source code with the above directive it fails
with:
Error: Unclassifiable GCC directive at (1)
A small test code:
program test
integer :: i
real :: a(3)
!GCC$ unroll 3
do i = 1, 3
a(i) = 2.
end do
print *, sum(a)
end program
Tested versions:
Failed: 4.7.2
Failed: 4.8.3
Failed: 4.8.4
Failed: 4.8.5
Failed: 4.9.1
Failed: 4.9.2
Failed: 5.1.0
Failed: 5.2.0
Failed: 5.3.0
Failed: 5.4.0
Failed: 6.1.0
Failed: 6.2.0
Failed: 6.3.0
Failed: 6.4.0
Failed: 6.5.0
Failed: 7.1.0
Failed: 7.2.0
Failed: 7.3.0
Failed: 7.4.0
Success: 8.1.0
Success: 8.2.0
Success: 8.3.0
I would recommend that using non-existing or mis-typed directives should
*never* issues errors, but rather warnings.
The reasoning is that if new directives are added the source would need
pre-processor statements to determine the used gfortran version in order to
decide on the acceptance of each directive. This becomes cumbersome and
unnecessary.
